Spectroscopic Studies on Charge Transfer from Ce^(3+) to Yb^(3+) in KMgF_3∶Ce,Yb Nanocrystals  

作　　者：YAN Jing-hui ZHANG Hai-yan LI Zhong-tian CAO Jie SONG Li-hong ZHANG Hui-qiu SHI Chun-shan 

机构地区：[1]College of Chemistry and Environmental Engineering, Changchun University of Science and Technology, Changchun 130022, P. R. China [2]Key Laboratory of Rare Earth Chemistry and Physics, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, P. R. China

出　　处：《Chemical Research in Chinese Universities》2007年第4期395-398,共4页高等学校化学研究（英文版）

基　　金：Supported by the Science Foundation of Changchun City of China(No.2005093);the Science and Technology Departmentof Jilin Province,P.R.China(No.20050507).

摘　　要：Nanocrystals of KMgF3 single-doped and codoped with Ce^3＋ or/and Yb^3＋ were synthesized separately by the mi-croemulsion method. The X-ray diffraction（XRD） patterns were indexed to show that the KMgF3 crystal system was unchanged. The fluorescent spectra of KMgF3： Ce, Yb polycrystal powders were studied and compared with those of the Ce,Yb doped KMgF3 crystals produced using the high-temperature solid phase method. The diffuse reflection spectra and infrared emission of KMgF3： Ce, Yb were investigated. From the results, the authors could confirm that there were charge transfer processes from Ce^3＋ to Yb^3＋ in both KMgF3： Ce,Yb nanocrystals and polycrystal powders.Nanocrystals of KMgF3 single-doped and codoped with Ce^3＋ or/and Yb^3＋ were synthesized separately by the mi-croemulsion method. The X-ray diffraction（XRD） patterns were indexed to show that the KMgF3 crystal system was unchanged. The fluorescent spectra of KMgF3： Ce, Yb polycrystal powders were studied and compared with those of the Ce,Yb doped KMgF3 crystals produced using the high-temperature solid phase method. The diffuse reflection spectra and infrared emission of KMgF3： Ce, Yb were investigated. From the results, the authors could confirm that there were charge transfer processes from Ce^3＋ to Yb^3＋ in both KMgF3： Ce,Yb nanocrystals and polycrystal powders.

关 键 词：MICROEMULSION Nanocrystal Fluorescent spectra Charge transfer 

分 类 号：TB383[一般工业技术—材料科学与工程]